I say go for it. I'm all into strange ideas, and why the heck not. Who cares if it's not competitive if you're just going to hoon around the streets on it. One of the best times I had was chasing a YSR80 round the streetsand through the traffic. I was getting left on the straights, but was making up ground in the traffic jams. I was on an NSR50

I've got my old CR500 frame propping up the workshop wall, and I keep threatening to put an NSR250 motor in it just for a laugh. But then again, after looking at those crossers that the US blokes are turning into road racers, and that seems like a project for my CR500 SM to get into.